2461991 has 12 divisors (see below), whose sum is σ = 2991408. Its totient is φ = 1984512.

The previous prime is 2461973. The next prime is 2461993. The reversal of 2461991 is 1991642.

It is a de Polignac number, because none of the positive numbers 2^k-2461991 is a prime.

It is a super-2 number, since 2×2461991² = 12122799368162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2461993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1415 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (249284).

2^2461991 is an apocalyptic number.

2461991 is a deficient number, since it is larger than the sum of its proper divisors (529417).

2461991 is a wasteful number, since it uses less digits than its factorization.

2461991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258 (or 1241 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 2461991 is about 1569.0732933805. The cubic root of 2461991 is about 135.0295500014.

The spelling of 2461991 in words is "two million, four hundred sixty-one thousand, nine hundred ninety-one".